diff --git a/Userland/Libraries/LibJS/Runtime/ArrayBufferPrototype.cpp b/Userland/Libraries/LibJS/Runtime/ArrayBufferPrototype.cpp
index 89aafda333..f426754539 100644
--- a/Userland/Libraries/LibJS/Runtime/ArrayBufferPrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/ArrayBufferPrototype.cpp
@@ -7,7 +7,6 @@
 
 #include <AK/Function.h>
 #include <LibJS/Runtime/AbstractOperations.h>
-#include <LibJS/Runtime/ArrayBuffer.h>
 #include <LibJS/Runtime/ArrayBufferConstructor.h>
 #include <LibJS/Runtime/ArrayBufferPrototype.h>
 #include <LibJS/Runtime/GlobalObject.h>
@@ -15,7 +14,7 @@
 namespace JS {
 
 ArrayBufferPrototype::ArrayBufferPrototype(GlobalObject& global_object)
-    : Object(*global_object.object_prototype())
+    : PrototypeObject(*global_object.object_prototype())
 {
 }
 
@@ -35,21 +34,10 @@ ArrayBufferPrototype::~ArrayBufferPrototype()
 {
 }
 
-static ArrayBuffer* array_buffer_object_from(VM& vm, GlobalObject& global_object)
-{
-    // ArrayBuffer.prototype.* deliberately don't coerce |this| value to object.
-    auto this_value = vm.this_value(global_object);
-    if (!this_value.is_object() || !is<ArrayBuffer>(this_value.as_object())) {
-        vm.throw_exception<TypeError>(global_object, ErrorType::NotAnObjectOfType, "ArrayBuffer");
-        return nullptr;
-    }
-    return static_cast<ArrayBuffer*>(&this_value.as_object());
-}
-
 // 25.1.5.3 ArrayBuffer.prototype.slice ( start, end ), https://tc39.es/ecma262/#sec-arraybuffer.prototype.slice
 JS_DEFINE_NATIVE_FUNCTION(ArrayBufferPrototype::slice)
 {
-    auto array_buffer_object = array_buffer_object_from(vm, global_object);
+    auto array_buffer_object = typed_this_value(global_object);
     if (!array_buffer_object)
         return {};
 
@@ -126,7 +114,7 @@ JS_DEFINE_NATIVE_FUNCTION(ArrayBufferPrototype::slice)
 // 25.1.5.1 get ArrayBuffer.prototype.byteLength, https://tc39.es/ecma262/#sec-get-arraybuffer.prototype.bytelength
 JS_DEFINE_NATIVE_GETTER(ArrayBufferPrototype::byte_length_getter)
 {
-    auto array_buffer_object = array_buffer_object_from(vm, global_object);
+    auto array_buffer_object = typed_this_value(global_object);
     if (!array_buffer_object)
         return {};
 
diff --git a/Userland/Libraries/LibJS/Runtime/ArrayBufferPrototype.h b/Userland/Libraries/LibJS/Runtime/ArrayBufferPrototype.h
index e0d70ebe24..17536ac332 100644
--- a/Userland/Libraries/LibJS/Runtime/ArrayBufferPrototype.h
+++ b/Userland/Libraries/LibJS/Runtime/ArrayBufferPrototype.h
@@ -6,12 +6,13 @@
 
 #pragma once
 
-#include <LibJS/Runtime/Object.h>
+#include <LibJS/Runtime/ArrayBuffer.h>
+#include <LibJS/Runtime/PrototypeObject.h>
 
 namespace JS {
 
-class ArrayBufferPrototype final : public Object {
-    JS_OBJECT(ArrayBufferPrototype, Object);
+class ArrayBufferPrototype final : public PrototypeObject<ArrayBufferPrototype, ArrayBuffer> {
+    JS_PROTOTYPE_OBJECT(ArrayBufferPrototype, ArrayBuffer, ArrayBuffer);
 
 public:
     explicit ArrayBufferPrototype(GlobalObject&);